netdev - [bpf-next PATCH v4 7/7] bpf: sockmap set rlimit

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Message-ID: <20180122183711.11150.3547.stgit@john-Precision-Tower-5810>
Date:   Mon, 22 Jan 2018 10:37:11 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     borkmann@...earbox.net, kafai@...com, ast@...nel.org
Cc:     netdev@...r.kernel.org, brouer@...hat.com
Subject: [bpf-next PATCH v4 7/7] bpf: sockmap set rlimit

Avoid extra step of setting limit from cmdline and do it directly in
the program.

Signed-off-by: John Fastabend <john.fastabend@...il.com>
Acked-by: Martin KaFai Lau <kafai@...com>
---
 samples/sockmap/sockmap_user.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/samples/sockmap/sockmap_user.c b/samples/sockmap/sockmap_user.c
index fe943c9..7c25c0c 100644
--- a/samples/sockmap/sockmap_user.c
+++ b/samples/sockmap/sockmap_user.c
@@ -27,6 +27,7 @@
 #include <time.h>
 
 #include <sys/time.h>
+#include <sys/resource.h>
 #include <sys/types.h>
 
 #include <linux/netlink.h>
@@ -447,6 +448,7 @@ enum {
 int main(int argc, char **argv)
 {
 	int iov_count = 1, length = 1024, rate = 1, verbose = 0;
+	struct rlimit r = {10 * 1024 * 1024, RLIM_INFINITY};
 	int opt, longindex, err, cg_fd = 0;
 	int test = PING_PONG;
 	char filename[256];
@@ -501,6 +503,11 @@ int main(int argc, char **argv)
 		return -1;
 	}
 
+	if (setrlimit(RLIMIT_MEMLOCK, &r)) {
+		perror("setrlimit(RLIMIT_MEMLOCK)");
+		return 1;
+	}
+
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
 	running = 1;